Doubletree



F. LSTORER.

DOUBLETREE.

APPLICATION FILED JUNK-113, m9.

1 ,408,420. PatQnted Feb 28, 1922.

UNITED STATES FRED L. STOREB, OF KELLY, WYOMING.

' DOUBLETREE.

1 AOSAZO.

Specification of Letters Patent.

Patented Feb. 28, 1922.

Application filed June 13, 1919. Serial No. 304,078.

To all whom it may concern:

Be it known that FRED L. S'ronnu, a citizen of the United States of America, residing at Kelly, in the county of Lincoln and State of Wyoming, has invented new and useful Improvements in Doubletrees, of which the following is a specification.

The object of the invention is to provide a draught apparatus of the double tree type having improved means for equalizing the draught so as to compensate for variations in team power with a minimum of alteration in the relative arrangement of the elements of the device, and with this object in view the invention consists in a construction, combination and relation of parts specifically set forth hereinafter and a preferred embodiment of which is illustrated in the accompanying drawings wherein Figure 1 is a plan View of the double tree.

Figure 2 is a detail view of one end of the draught bar.

Figure 3 is a detail view of one member of the equalizing lever.

Figure 4 is a similar view of the adjusting element of the equalizing lever.

Figure 5 is a similar view of the bearing block.

In connection with a draught bar 10 which is provided with a central bearing block 11 having an opening 12 for a suitable pivot bolt for attachment of the apparatus to a vehicle, there is employed an equalizing lever consisting of the relatively adjustable corresponding elements 13 connected by an adjusting member 1 1 which carries a fulcrum element 15, consisting in the present instance of a nut adapted for engagement with a seat 16 in the bearing block. The adjusting member preferably consists of a bolt engaged with cars 17 on the inner ends of the elements of the equalizing lever one end of said bolt being provided with a head 18 and the other being engaged by an adjusting nut 19, so that the elements may be adj usted relatively to each other to vary the length of the lever as a whole, and atthe same time the nut 15 which constitutes the fulcrum element is capable of adjustment upon said bolt toward or from the extremity of either of the lever elements or relative to the interval between the inner ends of said lever elements, so as to dispose the fulcrum of the lever as a unitary structure at any desired relative distances from the remote extremities of the elements 13.

Connected with the remote extremities of the equalizing lever by means of elongated guide links 20 are the single trees 21, it being understood, however, that by making the last-named parts of the proper proportions they may be used as double trees for the connection in turn of single trees with the terminal eyes 22 thereof. The elongated guide loops 2O embrace guide studs 23 formed as extensions on the extremities of the draught bar 10 and serving to maintain the various parts of the apparatus in their proper relative positions by preventing the accidental dismounting of the fulcrum ele ment 15 from the seat 16 in the bearing block of the draught bar.

Obviously by reason of the adjustment possible with reference to the equalizing lever and the fulcrum element thereof, the difference in draught power between the teams or animals connected respectively with the trees at opposite extremities of the equalizing lever may be compensated for so as to secure a relation between the parts adapted to secure the best results. It will be seen further that the length of the equalizing lever may be varied without affecting the relation between the same and its fulcrum upon the bearing block, or the fulcrum point may be varied relative to the length of the equalizing lever without altering the latter.

Claimedz- A double tree comprising a draft bar, an intermediately positioned bearing block mounted on the rear edge of the draft bar and formed itself with a seat in the rear edge, a pair of relatively adjustable elements each of which is provided with an elongated guide link at one extremity, the said guide links embracing guide studs at the extremities of the draft bar, single trees attached to the guide links, and an adjusting member connecting said elements and consisting of a bolt provided at one end with a head and at the other end with an adjusting nut, the bolt passing through ears formed 011 the in her ends of said elements, and a nut carried at an intermediate point on the bolt and engaged in the seat in the said bearing block.

In testimony whereof I affix my signature.

FRED L. STORER. 

